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Blood, 16 July 2009, Vol. 114, No. 3, pp. 511-517. Prepublished online as a Blood First Edition Paper on May 14, 2009; DOI 10.1182/blood-2009-03-212290.
Submitted March 24, 2009
University of Texas M. D. Anderson Cancer Center, Houston, TX, United States * Corresponding author; email: aalousi{at}mdanderson.org.
Acute graft versus host disease (AGVHD) is the primary limitation of allogeneic hematopoietic cell transplantation (HCT). Corticosteroids remain the standard initial therapy, yet only 25-40% of patients completely respond (CR). This randomized, four-arm, phase II trial was designed to identify the most promising agent(s) for initial therapy for AGVHD. Patients were randomized to receive methylprednisolone 2 mg/kg/day plus etanercept, mycophenolate mofetil (MMF), denileukin diftitox (denileukin) or pentostatin. 180 patients were randomized; median age: 50 years (range, 7.5-70). Myeloablative conditioning represented 66% of transplants. Grafts were peripheral blood (PB, 61%), bone marrow (BM, 25%) or umbilical cord blood (UCB, 14%); 53% were from unrelated donors. Patients who received MMF for prophylaxis (24%) were randomized to a non-MMF arm. At randomization, AGVHD was grade I-II (68%), III-IV (32%) and (53%) had visceral organ involvement. Day 28 CR rates were etanercept 26%, MMF 60%, denileukin 53% and pentostatin 38%. Corresponding 9-month overall survival was 47%, 64%, 49% and 47%, respectively. Cumulative incidences of severe infections were: etanercept 48%, MMF 44%, denileukin 62%, and pentostatin 57%. Efficacy and toxicity data suggest MMF plus corticosteroids is the most promising regimen to compare against corticosteroids alone as initial AGVHD treatment in a definitive Phase III trial. This study is registered at http://www.clinicaltrials.gov as NCT00224874.
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